Adam Green for The New Yorker:
Again, Robbins begged off, but he offered to do a trick instead. He instructed [Penn] Jillette to place a ring that he was wearing on a piece of paper and trace its outline with a pen. By now, a small crowd had gathered. Jillette removed his ring, put it down on the paper, unclipped a pen from his shirt, and leaned forward, preparing to draw. After a moment, he froze and looked up. His face was pale.
“Fuck. You,” he said, and slumped into a chair.
Robbins held up a thin, cylindrical object: the cartridge from Jillette’s pen.